Geared Teacher Clock for School Maths Lab

Quick Answer: A Geared Teacher Clock is a demonstration clock whose hour and minute hands are linked by gears, so turning the minute hand moves the hour hand the right amount. The geared teacher clock is used in front of the class to show how time passes, how both hands move together and how to read any time.

Why the Gears Matter

On a real clock the hour hand creeps forward all the time: it travels from one number to the next during each hour. On a clock with loose hands, a teacher must remember to nudge the hour hand along, and pupils often do not notice. A geared clock does it automatically. Turn the minute hand a full circle and the hour hand advances exactly one number, which is one twelfth of a turn. Turn it a quarter circle and the hour hand moves a quarter of the way to the next number.

That makes the geared clock the right tool for demonstrating passing time. The teacher sets 2:00, then turns the minute hand while the class counts in fives, and everyone sees the hour hand drift towards 3 as the minutes go by. By 2:45 it is visibly close to 3, which explains why pupils sometimes misread the hour just before it changes.

The clock is also useful in upper classes for angle problems. The minute hand turns 6 degrees every minute and the hour hand half a degree. At 3:30 the hour hand has moved halfway from 3 to 4, so the angle between the hands is 75 degrees, not 90, and the clock lets students check their calculation against what they see.

Specifications

Applications

• Demonstrating how both hands move as time passes
• Counting forward in fives and fifteens for elapsed-time problems
• Showing why the hour hand sits between numbers for most of the hour
• Checking calculated angles between the hands at a given time

Care & Handling

• Set the geared teacher clock by turning the minute hand or its setting knob, never by pushing the hour hand, which strains the gears.
• Turn the hands smoothly rather than spinning them fast.
• Store the clock face up in a cupboard, away from damp.

Why Choose LabEquip

Primary teachers who demonstrate time to the whole class are the usual buyers, often with a set of Dummy Clocks so pupils can copy each time at their desks. LabEquip lists both in Mathematics School Lab Products; ask about quantities through the contact page.

Frequently Asked Questions

What does geared mean on a teaching clock?

The hour and minute hands are connected by gears, as in a real clock. When the minute hand is turned, the hour hand moves by the correct amount, one number for each full turn of the minute hand.

Why is a geared clock useful for teaching time?

Pupils see that the hour hand moves steadily through the hour rather than jumping from number to number. That helps them read times such as 2:45, when the hour hand is close to 3 but the hour is still 2.

How do students find the angle between the hands?

The minute hand moves 6 degrees per minute and the hour hand 0.5 degrees per minute. At 3:30 the minute hand is at 180 degrees and the hour hand at 105 degrees, so the angle between them is 75 degrees.

How far does the hour hand move in one hour?

It moves from one number to the next, which is one twelfth of a full turn, or 30 degrees. In each minute it moves half a degree.

How is the teacher clock used with pupils’ clocks?

The teacher sets a time on the geared clock and pupils copy it on their own clocks, or pupils set a time first and the teacher checks it against the demonstration clock for the class.

How should the gear mechanism be looked after?

Always set the time by turning the minute hand or the setting knob, and turn it smoothly. Pushing the hour hand directly or spinning the hands quickly can strip or loosen the gears.

Last Updated: September 2026